VMAXTANKS BC8S1215A 15A 8-Stage Microprocessor Controlled
Battery Smart Charger / Maintainer for
12 Volt Batteries 

This is a fully automatic battery charger with 8 charge stages.
Automatic charging protects your battery from being overcharged. So you can leave the charger connected to the battery indefinitely.
8-stage charging is a very comprehensive and accurate charging process that gives your battery longer life and better performance compared to using traditional chargers.
8-stage chargers are suitable for most battery types including WET, MF, Calcium, AGM, and GEL batteries. They may also help restore drained and sulphated batteries.
The 8 stages are:
Desulphation ; Soft Start; Bulk; Absorption; Analyze; Recondition; Float. And Pulse.

 Specifications:

Input Voltage: 110VAC
Input Current: 3.8A
Nominal Voltage:12V
Bulk Charge Voltage: 14.1V (GEL), 14.4V (AGM), 14.7V (WET), 14.7V (CALCIUM)
Float Voltage: 13.7V with Pulse Feature.
Bulk Charge Current: 15A
Cooling Fan: Automatic Temperature Controlled
Battery Type: SLA, GEL, AGM
Battery Capacity: 60-225Ah 
Connector: Insulated Alligator Clamps
Size: 8.5 L x 4.5" W x 2.5" H
Weight: 3 lb.